"I think Zidane might be forced to go to the January market to recruit one or two great signings for the team.

"I think Zidane has a lot of work ahead to return this team to what it was when he won three consecutive Champions Leagues."

Looking at his former club Barcelona, Rivaldo issued a word of caution to those talking up the potential of 16-year-old playmaker Ansu Fati.

The Guinea-Bissau-born teenager has made three La Liga appearances for Ernesto Valverde's side this season and was given his Champions League bow in a goalless draw with Borussia Dortmund on Tuesday evening.

Fati played 59 minutes of a cagey match before being replaced by Lionel Messi, but Rivaldo said it is too soon to draw comparisons between the two.

He said: "It would be putting too much pressure on his shoulders. He is still a kid who is not yet even a member of the first team. We will give him time and space to play his football and in the future we will see whether or not he is the new Messi."